I see it a lot in movies, period settings as well as present day action films. The hero gets a bleeding wound and burns his wound to seal it.
Is this a modern day thing?
https://www.reddit.com/r/AskHistorians/comments/1pngem/cauterization_in_the_ancientmedieval_world/
Found this answer which is more or less what I was looking for in the history of cauterizing wounds.